%0 Journal Article %A V. P. Platonov %T The problem of strong approximation and the Kneser--Tits conjecture for algebraic groups %J Izvestiya. Mathematics %D 1969 %P 1139-1147 %V 3 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1969_3_6_a0/ %G en %F IM2_1969_3_6_a0